This title appears in the Scientific Report :
2013
Please use the identifier:
http://hdl.handle.net/2128/18180 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.4789453 in citations.
Derivation of Stochastic differential Equations for Scrape-off Layer Plasma fluctuations from experimentally measured statistics
Derivation of Stochastic differential Equations for Scrape-off Layer Plasma fluctuations from experimentally measured statistics
A stochastic differential equation for intermittent plasma density dynamics in magnetic fusion edge plasma is derived, which is consistent with the experimentally measured gamma distribution and the theoretically expected quadratic nonlinearity. The plasma density is driven by a multiplicative Wiene...
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Personal Name(s): | Mekkaoui, A. (Corresponding author) |
---|---|
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physics of plasmas, 20 1, S. 010701 |
Imprint: |
[S.l.]
American Institute of Physics
2013
|
DOI: |
10.1063/1.4789453 |
Document Type: |
Journal Article |
Research Program: |
Plasma theory |
Link: |
OpenAccess Restricted Restricted |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1063/1.4789453 in citations.
A stochastic differential equation for intermittent plasma density dynamics in magnetic fusion edge plasma is derived, which is consistent with the experimentally measured gamma distribution and the theoretically expected quadratic nonlinearity. The plasma density is driven by a multiplicative Wiener process and evolves on the turbulence correlation time scale, while the linear growth is quadratically damped by the fluctuation level. The sensitivity of intermittency to the nonlinear dynamics is investigated by analyzing the nonlinear Langevin representation of the beta process, which leads to a root-square nonlinearity. |